Old Westbury, NY is a city located in Nassau County, New York and has a land area of 8.67 square miles (22.46 km2). The water area for the city is 0.00 square miles or 0.00 km2. There is one unique zip code in Old Westbury, New York and it is 11568. The area code(s) for Old Westbury is 516/631.
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